src/hardware/scpi-pps/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2014 Bert Vermeulen <bert@biot.com>
   5  * Copyright (C) 2017 Frank Stettner <frank-stettner@gmx.net>
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation, either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include <config.h>
  22 #include <string.h>
  23 #include <strings.h>
  24 #include "scpi.h"
  25 #include "protocol.h"
  26
  27 static struct sr_dev_driver scpi_pps_driver_info;
  28 static struct sr_dev_driver hp_ib_pps_driver_info;
  29
  30 static const uint32_t scanopts[] = {
  31         SR_CONF_CONN,
  32         SR_CONF_SERIALCOMM,
  33 };
  34
  35 static const uint32_t drvopts[] = {
  36         SR_CONF_POWER_SUPPLY,
  37 };
  38
  39 static const struct pps_channel_instance pci[] = {
  40         { SR_MQ_VOLTAGE, SCPI_CMD_GET_MEAS_VOLTAGE, "V" },
  41         { SR_MQ_CURRENT, SCPI_CMD_GET_MEAS_CURRENT, "I" },
  42         { SR_MQ_POWER, SCPI_CMD_GET_MEAS_POWER, "P" },
  43         { SR_MQ_FREQUENCY, SCPI_CMD_GET_MEAS_FREQUENCY, "F" },
  44 };
  45
  46 static struct sr_dev_inst *probe_device(struct sr_scpi_dev_inst *scpi,
  47                 int (*get_hw_id)(struct sr_scpi_dev_inst *scpi,
  48                 struct sr_scpi_hw_info **scpi_response))
  49 {
  50         struct dev_context *devc;
  51         struct sr_dev_inst *sdi;
  52         struct sr_scpi_hw_info *hw_info;
  53         struct sr_channel_group *cg;
  54         struct sr_channel *ch;
  55         const struct scpi_pps *device;
  56         struct pps_channel *pch;
  57         struct channel_spec *channels;
  58         struct channel_group_spec *channel_groups, *cgs;
  59         struct pps_channel_group *pcg;
  60         GRegex *model_re;
  61         GMatchInfo *model_mi;
  62         GSList *l;
  63         uint64_t mask;
  64         unsigned int num_channels, num_channel_groups, ch_num, ch_idx, i, j;
  65         int ret;
  66         const char *vendor;
  67         char ch_name[16];
  68
  69         if (get_hw_id(scpi, &hw_info) != SR_OK) {
  70                 sr_info("Couldn't get IDN response.");
  71                 return NULL;
  72         }
  73
  74         device = NULL;
  75         for (i = 0; i < num_pps_profiles; i++) {
  76                 vendor = sr_vendor_alias(hw_info->manufacturer);
  77                 if (g_ascii_strcasecmp(vendor, pps_profiles[i].vendor))
  78                         continue;
  79                 model_re = g_regex_new(pps_profiles[i].model, 0, 0, NULL);
  80                 if (g_regex_match(model_re, hw_info->model, 0, &model_mi))
  81                         device = &pps_profiles[i];
  82                 g_match_info_unref(model_mi);
  83                 g_regex_unref(model_re);
  84                 if (device)
  85                         break;
  86         }
  87         if (!device) {
  88                 sr_scpi_hw_info_free(hw_info);
  89                 return NULL;
  90         }
  91
  92         sdi = g_malloc0(sizeof(struct sr_dev_inst));
  93         sdi->vendor = g_strdup(vendor);
  94         sdi->model = g_strdup(hw_info->model);
  95         sdi->version = g_strdup(hw_info->firmware_version);
  96         sdi->conn = scpi;
  97         sdi->driver = &scpi_pps_driver_info;
  98         sdi->inst_type = SR_INST_SCPI;
  99         sdi->serial_num = g_strdup(hw_info->serial_number);
 100
 101         devc = g_malloc0(sizeof(struct dev_context));
 102         devc->device = device;
 103         sr_sw_limits_init(&devc->limits);
 104         sdi->priv = devc;
 105
 106         if (device->num_channels) {
 107                 /* Static channels and groups. */
 108                 channels = (struct channel_spec *)device->channels;
 109                 num_channels = device->num_channels;
 110                 channel_groups = (struct channel_group_spec *)device->channel_groups;
 111                 num_channel_groups = device->num_channel_groups;
 112         } else {
 113                 /* Channels and groups need to be probed. */
 114                 ret = device->probe_channels(sdi, hw_info, &channels, &num_channels,
 115                                 &channel_groups, &num_channel_groups);
 116                 if (ret != SR_OK) {
 117                         sr_err("Failed to probe for channels.");
 118                         return NULL;
 119                 }
 120                 /*
 121                  * Since these were dynamically allocated, we'll need to free them
 122                  * later.
 123                  */
 124                 devc->channels = channels;
 125                 devc->channel_groups = channel_groups;
 126         }
 127
 128         ch_idx = 0;
 129         for (ch_num = 0; ch_num < num_channels; ch_num++) {
 130                 /* Create one channel per measurable output unit. */
 131                 for (i = 0; i < ARRAY_SIZE(pci); i++) {
 132                         if (!sr_scpi_cmd_get(devc->device->commands, pci[i].command))
 133                                 continue;
 134                         g_snprintf(ch_name, 16, "%s%s", pci[i].prefix,
 135                                         channels[ch_num].name);
 136                         ch = sr_channel_new(sdi, ch_idx++, SR_CHANNEL_ANALOG, TRUE,
 137                                         ch_name);
 138                         pch = g_malloc0(sizeof(struct pps_channel));
 139                         pch->hw_output_idx = ch_num;
 140                         pch->hwname = channels[ch_num].name;
 141                         pch->mq = pci[i].mq;
 142                         ch->priv = pch;
 143                 }
 144         }
 145
 146         for (i = 0; i < num_channel_groups; i++) {
 147                 cgs = &channel_groups[i];
 148                 cg = g_malloc0(sizeof(struct sr_channel_group));
 149                 cg->name = g_strdup(cgs->name);
 150                 for (j = 0, mask = 1; j < 64; j++, mask <<= 1) {
 151                         if (cgs->channel_index_mask & mask) {
 152                                 for (l = sdi->channels; l; l = l->next) {
 153                                         ch = l->data;
 154                                         pch = ch->priv;
 155                                         if (pch->hw_output_idx == j)
 156                                                 cg->channels = g_slist_append(cg->channels, ch);
 157                                 }
 158                         }
 159                 }
 160                 pcg = g_malloc0(sizeof(struct pps_channel_group));
 161                 pcg->features = cgs->features;
 162                 cg->priv = pcg;
 163                 sdi->channel_groups = g_slist_append(sdi->channel_groups, cg);
 164         }
 165
 166         sr_scpi_hw_info_free(hw_info);
 167         hw_info = NULL;
 168
 169         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_LOCAL);
 170
 171         return sdi;
 172 }
 173
 174 static gchar *hpib_get_revision(struct sr_scpi_dev_inst *scpi)
 175 {
 176         int ret;
 177         gboolean matches;
 178         char *response;
 179         GRegex *version_regex;
 180
 181         ret = sr_scpi_get_string(scpi, "ROM?", &response);
 182         if (ret != SR_OK && !response)
 183                 return NULL;
 184
 185         /* Example version string: "B01 B01" */
 186         version_regex = g_regex_new("[A-Z][0-9]{2} [A-Z][0-9]{2}", 0, 0, NULL);
 187         matches = g_regex_match(version_regex, response, 0, NULL);
 188         g_regex_unref(version_regex);
 189
 190         if (!matches) {
 191                 /* Not a valid version string. Ignore it. */
 192                 g_free(response);
 193                 response = NULL;
 194         } else {
 195                 /* Replace space with dot. */
 196                 response[3] = '.';
 197         }
 198
 199         return response;
 200 }
 201
 202 /*
 203  * This function assumes the response is in the form "HP<model_number>"
 204  *
 205  * HP made many GPIB (then called HP-IB) instruments before the SCPI command
 206  * set was introduced into the standard. We haven't seen any non-HP instruments
 207  * which respond to the "ID?" query, so assume all are HP for now.
 208  */
 209 static int hpib_get_hw_id(struct sr_scpi_dev_inst *scpi,
 210                           struct sr_scpi_hw_info **scpi_response)
 211 {
 212         int ret;
 213         char *response;
 214         struct sr_scpi_hw_info *hw_info;
 215
 216         ret = sr_scpi_get_string(scpi, "ID?", &response);
 217         if ((ret != SR_OK) || !response)
 218                 return SR_ERR;
 219
 220         hw_info = g_malloc0(sizeof(struct sr_scpi_hw_info));
 221
 222         *scpi_response = hw_info;
 223         hw_info->model = response;
 224         hw_info->firmware_version = hpib_get_revision(scpi);
 225         hw_info->manufacturer = g_strdup("HP");
 226
 227         return SR_OK;
 228 }
 229
 230 static struct sr_dev_inst *probe_scpi_pps_device(struct sr_scpi_dev_inst *scpi)
 231 {
 232         return probe_device(scpi, sr_scpi_get_hw_id);
 233 }
 234
 235 static struct sr_dev_inst *probe_hpib_pps_device(struct sr_scpi_dev_inst *scpi)
 236 {
 237         return probe_device(scpi, hpib_get_hw_id);
 238 }
 239
 240 static GSList *scan_scpi_pps(struct sr_dev_driver *di, GSList *options)
 241 {
 242         return sr_scpi_scan(di->context, options, probe_scpi_pps_device);
 243 }
 244
 245 static GSList *scan_hpib_pps(struct sr_dev_driver *di, GSList *options)
 246 {
 247         return sr_scpi_scan(di->context, options, probe_hpib_pps_device);
 248 }
 249
 250 static int dev_open(struct sr_dev_inst *sdi)
 251 {
 252         struct dev_context *devc;
 253         struct sr_scpi_dev_inst *scpi;
 254         GVariant *beeper;
 255
 256         scpi = sdi->conn;
 257         if (sr_scpi_open(scpi) < 0)
 258                 return SR_ERR;
 259
 260         devc = sdi->priv;
 261         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_REMOTE);
 262         devc->beeper_was_set = FALSE;
 263         if (sr_scpi_cmd_resp(sdi, devc->device->commands, 0, NULL,
 264                         &beeper, G_VARIANT_TYPE_BOOLEAN, SCPI_CMD_BEEPER) == SR_OK) {
 265                 if (g_variant_get_boolean(beeper)) {
 266                         devc->beeper_was_set = TRUE;
 267                         sr_scpi_cmd(sdi, devc->device->commands,
 268                                 0, NULL, SCPI_CMD_BEEPER_DISABLE);
 269                 }
 270                 g_variant_unref(beeper);
 271         }
 272
 273         return SR_OK;
 274 }
 275
 276 static int dev_close(struct sr_dev_inst *sdi)
 277 {
 278         struct sr_scpi_dev_inst *scpi;
 279         struct dev_context *devc;
 280
 281         devc = sdi->priv;
 282         scpi = sdi->conn;
 283
 284         if (!scpi)
 285                 return SR_ERR_BUG;
 286
 287         if (devc->beeper_was_set)
 288                 sr_scpi_cmd(sdi, devc->device->commands,
 289                         0, NULL, SCPI_CMD_BEEPER_ENABLE);
 290         sr_scpi_cmd(sdi, devc->device->commands, 0, NULL, SCPI_CMD_LOCAL);
 291
 292         return sr_scpi_close(scpi);
 293 }
 294
 295 static void clear_helper(struct dev_context *devc)
 296 {
 297         g_free(devc->channels);
 298         g_free(devc->channel_groups);
 299 }
 300
 301 static int dev_clear(const struct sr_dev_driver *di)
 302 {
 303         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
 304 }
 305
 306 static int config_get(uint32_t key, GVariant **data,
 307         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 308 {
 309         struct dev_context *devc;
 310         const GVariantType *gvtype;
 311         unsigned int i;
 312         int channel_group_cmd;
 313         char *channel_group_name;
 314         int cmd, ret;
 315         const char *s;
 316         int oper_cond;
 317
 318         if (!sdi)
 319                 return SR_ERR_ARG;
 320
 321         devc = sdi->priv;
 322
 323         if (cg) {
 324                 /*
 325                  * These options only apply to channel groups with a single
 326                  * channel -- they're per-channel settings for the device.
 327                  */
 328
 329                 /*
 330                  * Config keys are handled below depending on whether a channel
 331                  * group was provided by the frontend. However some of these
 332                  * take a CG on one PPS but not on others. Check the device's
 333                  * profile for that here, and NULL out the channel group as needed.
 334                  */
 335                 for (i = 0; i < devc->device->num_devopts; i++) {
 336                         if (devc->device->devopts[i] == key) {
 337                                 cg = NULL;
 338                                 break;
 339                         }
 340                 }
 341         }
 342
 343         gvtype = NULL;
 344         cmd = -1;
 345         switch (key) {
 346         case SR_CONF_ENABLED:
 347                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 348                 cmd = SCPI_CMD_GET_OUTPUT_ENABLED;
 349                 break;
 350         case SR_CONF_VOLTAGE:
 351                 gvtype = G_VARIANT_TYPE_DOUBLE;
 352                 cmd = SCPI_CMD_GET_MEAS_VOLTAGE;
 353                 break;
 354         case SR_CONF_VOLTAGE_TARGET:
 355                 gvtype = G_VARIANT_TYPE_DOUBLE;
 356                 cmd = SCPI_CMD_GET_VOLTAGE_TARGET;
 357                 break;
 358         case SR_CONF_OUTPUT_FREQUENCY:
 359                 gvtype = G_VARIANT_TYPE_DOUBLE;
 360                 cmd = SCPI_CMD_GET_MEAS_FREQUENCY;
 361                 break;
 362         case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 363                 gvtype = G_VARIANT_TYPE_DOUBLE;
 364                 cmd = SCPI_CMD_GET_FREQUENCY_TARGET;
 365                 break;
 366         case SR_CONF_CURRENT:
 367                 gvtype = G_VARIANT_TYPE_DOUBLE;
 368                 cmd = SCPI_CMD_GET_MEAS_CURRENT;
 369                 break;
 370         case SR_CONF_CURRENT_LIMIT:
 371                 gvtype = G_VARIANT_TYPE_DOUBLE;
 372                 cmd = SCPI_CMD_GET_CURRENT_LIMIT;
 373                 break;
 374         case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
 375                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 376                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ENABLED;
 377                 break;
 378         case SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE:
 379                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 380                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_ACTIVE;
 381                 break;
 382         case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 383                 gvtype = G_VARIANT_TYPE_DOUBLE;
 384                 cmd = SCPI_CMD_GET_OVER_VOLTAGE_PROTECTION_THRESHOLD;
 385                 break;
 386         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 387                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 388                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ENABLED;
 389                 break;
 390         case SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE:
 391                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 392                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_ACTIVE;
 393                 break;
 394         case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 395                 gvtype = G_VARIANT_TYPE_DOUBLE;
 396                 cmd = SCPI_CMD_GET_OVER_CURRENT_PROTECTION_THRESHOLD;
 397                 break;
 398         case SR_CONF_OVER_TEMPERATURE_PROTECTION:
 399                 gvtype = G_VARIANT_TYPE_BOOLEAN;
 400                 cmd = SCPI_CMD_GET_OVER_TEMPERATURE_PROTECTION;
 401                 break;
 402         case SR_CONF_REGULATION:
 403                 gvtype = G_VARIANT_TYPE_STRING;
 404                 cmd = SCPI_CMD_GET_OUTPUT_REGULATION;
 405                 break;
 406         default:
 407                 return sr_sw_limits_config_get(&devc->limits, key, data);
 408         }
 409         if (!gvtype)
 410                 return SR_ERR_NA;
 411
 412         channel_group_cmd = 0;
 413         channel_group_name = NULL;
 414         if (cg) {
 415                 channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
 416                 channel_group_name = g_strdup(cg->name);
 417         }
 418
 419         ret = sr_scpi_cmd_resp(sdi, devc->device->commands,
 420                 channel_group_cmd, channel_group_name, data, gvtype, cmd);
 421         g_free(channel_group_name);
 422
 423         /*
 424          * Handle special cases
 425          */
 426
 427         if (cmd == SCPI_CMD_GET_OUTPUT_REGULATION) {
 428                 if (devc->device->dialect == SCPI_DIALECT_PHILIPS) {
 429                         /*
 430                         * The Philips PM2800 series returns VOLT/CURR. We always return
 431                         * a GVariant string in the Rigol notation (CV/CC/UR).
 432                         */
 433                         s = g_variant_get_string(*data, NULL);
 434                         if (!g_strcmp0(s, "VOLT")) {
 435                                 g_variant_unref(*data);
 436                                 *data = g_variant_new_string("CV");
 437                         } else if (!g_strcmp0(s, "CURR")) {
 438                                 g_variant_unref(*data);
 439                                 *data = g_variant_new_string("CC");
 440                         }
 441                 }
 442                 if (devc->device->dialect == SCPI_DIALECT_HP_66XXB) {
 443                         /* Evaluate Operational Status Register from a HP 66xxB. */
 444                         s = g_variant_get_string(*data, NULL);
 445                         sr_atoi(s, &oper_cond);
 446                         g_variant_unref(*data);
 447                         if (oper_cond & (1 << 8))
 448                                 *data = g_variant_new_string("CV");
 449                         else if (oper_cond & (1 << 10))
 450                                 *data = g_variant_new_string("CC");
 451                         else if (oper_cond & (1 << 11))
 452                                 *data = g_variant_new_string("CC-");
 453                         else
 454                                 *data = g_variant_new_string("UR");
 455                 }
 456
 457                 s = g_variant_get_string(*data, NULL);
 458                 if (g_strcmp0(s, "CV") && g_strcmp0(s, "CC") &&
 459                         g_strcmp0(s, "CC-") && g_strcmp0(s, "UR")) {
 460
 461                         sr_err("Unknown response to SCPI_CMD_GET_OUTPUT_REGULATION: %s", s);
 462                         ret = SR_ERR_DATA;
 463                 }
 464         }
 465
 466         return ret;
 467 }
 468
 469 static int config_set(uint32_t key, GVariant *data,
 470         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 471 {
 472         struct dev_context *devc;
 473         double d;
 474         int channel_group_cmd;
 475         char *channel_group_name;
 476         int ret;
 477
 478         if (!sdi)
 479                 return SR_ERR_ARG;
 480
 481         channel_group_cmd = 0;
 482         channel_group_name = NULL;
 483         if (cg) {
 484                 channel_group_cmd = SCPI_CMD_SELECT_CHANNEL;
 485                 channel_group_name = g_strdup(cg->name);
 486         }
 487
 488         devc = sdi->priv;
 489
 490         switch (key) {
 491         case SR_CONF_ENABLED:
 492                 if (g_variant_get_boolean(data))
 493                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 494                                         channel_group_cmd, channel_group_name,
 495                                         SCPI_CMD_SET_OUTPUT_ENABLE);
 496                 else
 497                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 498                                         channel_group_cmd, channel_group_name,
 499                                         SCPI_CMD_SET_OUTPUT_DISABLE);
 500                 break;
 501         case SR_CONF_VOLTAGE_TARGET:
 502                 d = g_variant_get_double(data);
 503                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 504                                 channel_group_cmd, channel_group_name,
 505                                 SCPI_CMD_SET_VOLTAGE_TARGET, d);
 506                 break;
 507         case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 508                 d = g_variant_get_double(data);
 509                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 510                                 channel_group_cmd, channel_group_name,
 511                                 SCPI_CMD_SET_FREQUENCY_TARGET, d);
 512                 break;
 513         case SR_CONF_CURRENT_LIMIT:
 514                 d = g_variant_get_double(data);
 515                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 516                                 channel_group_cmd, channel_group_name,
 517                                 SCPI_CMD_SET_CURRENT_LIMIT, d);
 518                 break;
 519         case SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED:
 520                 if (g_variant_get_boolean(data))
 521                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 522                                         channel_group_cmd, channel_group_name,
 523                                         SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_ENABLE);
 524                 else
 525                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 526                                         channel_group_cmd, channel_group_name,
 527                                         SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_DISABLE);
 528                 break;
 529         case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 530                 d = g_variant_get_double(data);
 531                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 532                                 channel_group_cmd, channel_group_name,
 533                                 SCPI_CMD_SET_OVER_VOLTAGE_PROTECTION_THRESHOLD, d);
 534                 break;
 535         case SR_CONF_OVER_CURRENT_PROTECTION_ENABLED:
 536                 if (g_variant_get_boolean(data))
 537                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 538                                         channel_group_cmd, channel_group_name,
 539                                         SCPI_CMD_SET_OVER_CURRENT_PROTECTION_ENABLE);
 540                 else
 541                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 542                                         channel_group_cmd, channel_group_name,
 543                                         SCPI_CMD_SET_OVER_CURRENT_PROTECTION_DISABLE);
 544                 break;
 545         case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 546                 d = g_variant_get_double(data);
 547                 ret = sr_scpi_cmd(sdi, devc->device->commands,
 548                                 channel_group_cmd, channel_group_name,
 549                                 SCPI_CMD_SET_OVER_CURRENT_PROTECTION_THRESHOLD, d);
 550                 break;
 551         case SR_CONF_OVER_TEMPERATURE_PROTECTION:
 552                 if (g_variant_get_boolean(data))
 553                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 554                                         channel_group_cmd, channel_group_name,
 555                                         SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_ENABLE);
 556                 else
 557                         ret = sr_scpi_cmd(sdi, devc->device->commands,
 558                                         channel_group_cmd, channel_group_name,
 559                                         SCPI_CMD_SET_OVER_TEMPERATURE_PROTECTION_DISABLE);
 560                 break;
 561         default:
 562                 ret = sr_sw_limits_config_set(&devc->limits, key, data);
 563         }
 564
 565         g_free(channel_group_name);
 566
 567         return ret;
 568 }
 569
 570 static int config_list(uint32_t key, GVariant **data,
 571         const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
 572 {
 573         struct dev_context *devc;
 574         struct sr_channel *ch;
 575         const struct channel_spec *ch_spec;
 576         int i;
 577         const char *s[16];
 578
 579         devc = (sdi) ? sdi->priv : NULL;
 580
 581         if (!cg) {
 582                 switch (key) {
 583                 case SR_CONF_SCAN_OPTIONS:
 584                 case SR_CONF_DEVICE_OPTIONS:
 585                         return std_opts_config_list(key, data, sdi, cg,
 586                                 ARRAY_AND_SIZE(scanopts),
 587                                 ARRAY_AND_SIZE(drvopts),
 588                                 (devc && devc->device) ? devc->device->devopts : NULL,
 589                                 (devc && devc->device) ? devc->device->num_devopts : 0);
 590                         break;
 591                 case SR_CONF_CHANNEL_CONFIG:
 592                         if (!devc || !devc->device)
 593                                 return SR_ERR_ARG;
 594                         /* Not used. */
 595                         i = 0;
 596                         if (devc->device->features & PPS_INDEPENDENT)
 597                                 s[i++] = "Independent";
 598                         if (devc->device->features & PPS_SERIES)
 599                                 s[i++] = "Series";
 600                         if (devc->device->features & PPS_PARALLEL)
 601                                 s[i++] = "Parallel";
 602                         if (i == 0) {
 603                                 /*
 604                                  * Shouldn't happen: independent-only devices
 605                                  * shouldn't advertise this option at all.
 606                                  */
 607                                 return SR_ERR_NA;
 608                         }
 609                         *data = g_variant_new_strv(s, i);
 610                         break;
 611                 default:
 612                         return SR_ERR_NA;
 613                 }
 614         } else {
 615                 /*
 616                  * Per-channel-group options depending on a channel are actually
 617                  * done with the first channel. Channel groups in PPS can have
 618                  * more than one channel, but they will typically be of equal
 619                  * specification for use in series or parallel mode.
 620                  */
 621                 ch = cg->channels->data;
 622                 if (!devc || !devc->device)
 623                         return SR_ERR_ARG;
 624                 ch_spec = &(devc->device->channels[ch->index]);
 625
 626                 switch (key) {
 627                 case SR_CONF_DEVICE_OPTIONS:
 628                         *data = std_gvar_array_u32(devc->device->devopts_cg, devc->device->num_devopts_cg);
 629                         break;
 630                 case SR_CONF_VOLTAGE_TARGET:
 631                         *data = std_gvar_min_max_step_array(ch_spec->voltage);
 632                         break;
 633                 case SR_CONF_OUTPUT_FREQUENCY_TARGET:
 634                         *data = std_gvar_min_max_step_array(ch_spec->frequency);
 635                         break;
 636                 case SR_CONF_CURRENT_LIMIT:
 637                         *data = std_gvar_min_max_step_array(ch_spec->current);
 638                         break;
 639                 case SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD:
 640                         *data = std_gvar_min_max_step_array(ch_spec->ovp);
 641                         break;
 642                 case SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD:
 643                         *data = std_gvar_min_max_step_array(ch_spec->ocp);
 644                         break;
 645                 default:
 646                         return SR_ERR_NA;
 647                 }
 648         }
 649
 650         return SR_OK;
 651 }
 652
 653 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 654 {
 655         struct dev_context *devc;
 656         struct sr_scpi_dev_inst *scpi;
 657         int ret;
 658
 659         devc = sdi->priv;
 660         scpi = sdi->conn;
 661
 662         /* Prime the pipe with the first channel. */
 663         devc->cur_acquisition_channel = sr_next_enabled_channel(sdi, NULL);
 664
 665         if ((ret = sr_scpi_source_add(sdi->session, scpi, G_IO_IN, 10,
 666                         scpi_pps_receive_data, (void *)sdi)) != SR_OK)
 667                 return ret;
 668         std_session_send_df_header(sdi);
 669         sr_sw_limits_acquisition_start(&devc->limits);
 670
 671         return SR_OK;
 672 }
 673
 674 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 675 {
 676         struct sr_scpi_dev_inst *scpi;
 677
 678         scpi = sdi->conn;
 679
 680         sr_scpi_source_remove(sdi->session, scpi);
 681
 682         std_session_send_df_end(sdi);
 683
 684         return SR_OK;
 685 }
 686
 687 static struct sr_dev_driver scpi_pps_driver_info = {
 688         .name = "scpi-pps",
 689         .longname = "SCPI PPS",
 690         .api_version = 1,
 691         .init = std_init,
 692         .cleanup = std_cleanup,
 693         .scan = scan_scpi_pps,
 694         .dev_list = std_dev_list,
 695         .dev_clear = dev_clear,
 696         .config_get = config_get,
 697         .config_set = config_set,
 698         .config_list = config_list,
 699         .dev_open = dev_open,
 700         .dev_close = dev_close,
 701         .dev_acquisition_start = dev_acquisition_start,
 702         .dev_acquisition_stop = dev_acquisition_stop,
 703         .context = NULL,
 704 };
 705
 706 static struct sr_dev_driver hp_ib_pps_driver_info = {
 707         .name = "hpib-pps",
 708         .longname = "HP-IB PPS",
 709         .api_version = 1,
 710         .init = std_init,
 711         .cleanup = std_cleanup,
 712         .scan = scan_hpib_pps,
 713         .dev_list = std_dev_list,
 714         .dev_clear = dev_clear,
 715         .config_get = config_get,
 716         .config_set = config_set,
 717         .config_list = config_list,
 718         .dev_open = dev_open,
 719         .dev_close = dev_close,
 720         .dev_acquisition_start = dev_acquisition_start,
 721         .dev_acquisition_stop = dev_acquisition_stop,
 722         .context = NULL,
 723 };
 724 SR_REGISTER_DEV_DRIVER(scpi_pps_driver_info);
 725 SR_REGISTER_DEV_DRIVER(hp_ib_pps_driver_info);